The upgrade system of BESIII ETOF with MRPC technology

TL;DR

This paper discusses the upgrade of the BESIII ETOF system using MRPC technology to achieve better timing resolution and particle identification, including design, testing, and performance validation.

Contribution

The paper presents the design, construction, and testing of a new MRPC-based ETOF system for BESIII, demonstrating its performance meets upgrade requirements.

Findings

System achieves better than 80 ps timing resolution

Successful integration of MRPC modules with electronics

System passes performance tests with cosmic rays

Abstract

The Beijing Spectrometer III (BESIII) endcap Time-Of-Filght (ETOF) was proposed to upgrade with Multigap Resistive Plate Chamber (MRPC) technology to substitute the current ETOF of scintillator+PMT for extending time resolutin better than 80 ps and enhance the particle identification capability to satisfy the higher precision requirement of physics. The ETOF system including MRPC modules, front end electronics (FEE), CLOCK module, fast control boards and time to digital modules (TDIG), has been designed, constructed and done some experimental tests seperately. Aiming at examining the quality of entire ETOF system and training the operation of all participated parts, a cosmic ray test system was built at the laboratory and underwent about three months to guarantee performance. In this paper the results will be presented indicating that the entire ETOF system works well and satisfies the requirements of the upgrade.